"It’s not just Black people that love Obama. The President is 'enormously popular' among all Democrats. Welcome to the Party," former DCCC official Brandon English wrote in his post.

"Do you have any idea how belittling it is to reduce Obama to the President that the Blacks like?"

English noted that both Sanders and Clinton have been attempting to curry favor among black voters.

"In a world of voting rights abuses and gerrymandered districts where Black voters are constantly disenfranchised, it’s nice to have someone speak directly to our needs for a few months every 4 years," he said.

English seemed to soften his criticism toward the end of the piece.

"So do I actually mean it when I say Go F--- Yourself, Bernie? No. Everyone’s allowed to have a bad day," he wrote. "Everyone makes mistakes when every word is captured on tape. If Bernie wins the nomination, I’ll be knocking on doors for him in Cleveland.

"But for today, and for that comment, and for anyone that tries to diminish Obama’s presidency to 'He’s popular with black people,' Go F--- Yourself."